Yes, a good advice! But I have several USB Audio devices...........every USB Audio device is working with hw:2,0. I reported this problem a bit ironicaly - it's not a (real) problem.
But, never set a format in mpd.conf, only with real need. To set 'format "*:32:*"' (or 24)is ok, it could(!) improve sonic quality because some dacs (or usb to spdif converters) prefer specific bit setting.
That governor is reset is a (half) minor problem - believe it or not, I heared it!
But - many, many, big, big thanks to the "armbians" - my cubox-i was less or more useless without armbian! You a